chambers



2 Sheets-Sheet 1.

(No Model.)

D. CHAMBER-S. SAW FILING MACHINE.

No. 309,763. Patented Dec. 23, 1884.-

INUENTIJH WITNEEEEE N. PETERs Plwlwumu m har. wmin um. D. c.

(No ModeL) 2'SheetSSheet 2.

D. CHAMBERS.

SAW FILING MACHINE.

No. 309,763. Patented 1m 23, 1884.

N, PETERS. Fhulo-Lalhugnphcr. Wishmglnn. n. a

UNITE STATES FFrcE.

ATENT DAVID CHAMBERS, OF HULL, QUEBEC, CANADA, ASSIGNOR OF ONE-FOURTH TO STURGIS SALMON OUSHMAN, OF SAME PLACE.

SAW-FILING MACHINE.

SPECIFICATION forming part of Letters Patent No. 309,763, dated December 23,1884.

Application filed May 26, 1884. (No model.)

To all whom it may concern.-

Be it known that I, DAVID CHAMBERS, of Hull, in the Province of Quebec, Canada, have invented new and useful Improvements in Handsaw-Filing Machines; and I do hereby declare the following to be a full, clear, and exact description of the same.

The object of my invention is to provide a convenient device for holding and moving straight saw-blades, guiding a three-cornered file in any desired angle and inclination mechanically, and combining with the same a simple device for setting the teeth.

Figure 1 is a perspective View of my new saw-filing machine. Fig. 2 is a cross-section of the same, andFig. 3 is another cross-section showing the saw-set in position. Fig. 4 is a plan or top view. Fig. 5 is asectional view of the file-guiding device.

My device consists, mainly, of a light bed long enough to receive the saw-blade, and provided with a movable jaw for gripping and holding same in a slot, and with a trunk or leg having lugs for securing it to a bench or other object. A carriage holding the fileguiding device slides upon the said bed, being moved by a spur-wheel gearing in rackteeth at the under side of the bed and turned at will. To the front of the bed is removably secured a bar having notches the pitch of which corresponds to the pitch of the sawteeth to be filed, the carriage carrying a sliding catch, which is forced into one of said notches by a spring, and which is provided with a jointed handle having eccentric shoulder for withdrawing the pin from the notch before moving the carriage. The carriage is further provided with a removable saw-set, consisting of a spring-retracted sliding pin or punch moved by an eccentrically-shouldered handle.

The file-holding device consists of a screwspindle vertically adjustable by means of nut and jam-nut, and carryinga cross-head which holds pivotally a bracket capable of adjustment in a vertical plane, said bracket forming a guide for a slotted fiat bar having a handle at each end, and to the lower edge of which thc three-cornered file is secured by means of pivoted latches having set-screws pressing against the handle.

A is the bed, consisting of two plates, A A, connected at the ends and forming the longitudinal slot at, to admit the saw-blade, the plate A provided with the raised lip a, facing the slot at, to provide an increased bearing-surface for the saw-blade which is pressed against it, and held by a bar, 13, having oblique slots b,working upon the studs a secured to the rear part, A", of the bed, which is preferably sloped upward toward the slot at, said bar B having a screw-stem, b, projecting through a slot, of, in the end of the bed, and is provided with a winged or other nut, If, for moving the same longitudinally.

G is the trunk or leg, through which the slot at is continued downward, so as to form two branches, connected at the lower end,-each secured to or formed integrally with one side of the bed, and provided with lugs 6, having eyes, through which screws or bolts may be passed for securing the same to a bench or other object.

A is a bar having notches corresponding in pitch to the teeth of the saw-blade. I prefer to provide this with slots, through which I secure the same removably to the front part, A, of the bed by means of winged or other nuts, a or screws, and also to notch both edges, the pitch of one differing from the other, so that by reversal one bar is available for two pitches.

D is the carriage. It consists of two branched slide-legs, d, rigidly connected at the crown by a cross-piece, the rear branches, d, being also. connected at the rear of the bed, and having grooves fitted upon the edge of the latter. The front branches, d are connected by a bracket, D, projecting outward and downward, and in which is journaled a short shaft, -E, carrying at the rear the spurwheel E, gearing'into rack-teeth a? at the under side of the bed-piece A, the front end having secured upon it a hand-wheel, E or equivalent.

F is a double-headed bracket secured upon the table-surface of the bracket D, and carrying a sliding catch-pin, f, having a taper point in position to engage the notches in the pitch-bar A, and pressed into the sameby a spring, f, coiled and pinned. upon it. Ahandle, 1', having a cam, f", is pivoted to the front end of the pin f eccentrieally. Thus by depressing the handle the point of the pin f is withdrawn from the notch in the bar A, and by raising the same again the spring presses the pin in another notch after the earriage has been moved in any direction.

To the other table-surface of the bracket D is bolted or otherwise removably secured a saw-set, which may be of any convenient construction.

In a bearing projecting from the base of the table D, close to the face of the saw-blade, and forming part of the bearer G, is a sliding pin or punch, g, held back by a spiral spring, pinned upon the same, and which may be projected against the saw-tooth by the lever G, pivoted to the bearer G, and having its downward movement limited by a set-screw, secured in the bearer G.

The file-guiding device is suspended from the center of the upper part of the carriage D. A screw-spindle, H, passing through an eye in the same, is vertically adjustable by means of a winged or other nut, h, at the top and a jainnut, h, below. Secured to the lower end of this screw is a cross-head, H, carrying a swing-bracket, I, pivoted to the cross-head, and capable of adjustment at any angle orinclination from the vertical by screws 7L2 71,", passing in the cross-head and forming the pivots. This bracket I is slotted longitudinally to admit in the slot z the fileholder and retain the same by pins 13 2'.

K is the file-holder, consisting of a doublehandled flat bar having a long slot, K, through which pass the pins '6, the slot being wide enough to allow some play.

L is athree-cornered file, which is pressed to the lower edge of the holder by lever clips or latches M, pivoted to the handles, and set against their lower edges by set-screw m.

The machine is operated as follows: The saw-blade to be filed is inserted in the slot at of the bed A, and secured therein by tightening up the nut b", and thus bringing the bar B to bear 011 the blade, pressing it against the lip a. The file L having been adjusted to the proper depth, angle, and inclination by the nuts h, h, and it", and a pitch-bar, A, of the same pitch as the saw-blade having been selected and secured upon the bed by nuts a the carriage may be moved to one end or the other and the spring-catch f allowed to engage the first notch by raising the handle f Filing may now commence, and each tooth filed until the file ceases to bite, when the carriage.

I engages the next notch, when the operation may be repeated.

The use of the saw-set G is self-evident. may be removed when not required.

I claim as my invention 1. A bed having longitudinal slot for the admission of a saw-blade, said bed provided with suitable gripping device or vise to hold the saw-blade, and with leg or other suitable means for securing the same to a bench or other object, a carriage sliding upon said bed and carrying a shaft with spur-wheel gearing into rack-teeth at the under side of the bed, for moving the same, also a spring-catch engaging notches in a bar adjustably secured to the bed, and the pitch of the notches corresponding to the pitch of the saw-teeth, a fileguiding device suspended from the upper part of said carriage, consisting of a swing-bracket pivoted to a cross-head having a screw-stem passing through the barof the carriage, and provided with nut and jam-nut for adjustment for height and angle, a doub1e-handled fileholder consisting of a fiat slotted bar guided longitudinally in said swing-bracket and having vertical play,the file being clamped to the lower edge.

2. The bed A, consisting of the plates A A forming longitudinal slot a, with raised lip a, to form abutment for the jaw 13, to which a compound movement is imparted in drawing the same longitudinally by means of a nut, b working upon the screwstem b, projecting through the slotted end of the bed, and guided transversely by studs c projecting into oblique slots 1), the under side of the front part, A", provided with rack-teeth a", a notched bar, A, adj ustably secured to the top by means of screws or bolts a passed through slots in the bar, said bed provided with a slotted trunk, 0, having lugs c, with eyes to admit bolts or screws.

3. The carriage D, consisting of two branched legs, (I, rigidly connected at the top, the rear branches, d, connected in rear of the bed, and the front branches, (1 connected by a bracket, D, projecting outward and downward.

4. In combination with the carriage D, the bracket D, carrying the shaft E, spur-wheel E, and hand-wheel E, or equivalent, also bracket F, with spring sliding catch f.

5. In combination with the carriage D, the bracket D, with the propellingshaft E journaled therein, and carrying the spring-catch f and the saw-set G G g.

6. In combination with the carriage D, the file-guiding device consisting of the crosshead H, with screw-spindle H, adjust-ably secured for height and angle in the upper portion of the carriage by the nuts h h, the swing guide-bracket I, pivoted to the crosshead, and adjustable for inclination by the screws 7L2, forming the pivots, the file-holder K, running in the slot 6, and having long wide slot K, through which pass small pins I edge of the holder, all substantially as dei i, and provided with the lever-clips M, adscribed, and for the purpose set forth. 1o justed by the set-screws m. I Signed at Ottawa this 30th day of January,

7. The file-l1older K, consisting ofa flat bar 188%.

5 with handle at each end, provided with long D. CHAMBERS.

slot K, the lever-clips .M, pivoted near the In presence of handles and adjustable by set-sorews m, for l A. HARVEY, holding a three-cornered file, L, to the lower JOHN GRIST. 

